add missing flag check and docs

include/globals.h

@@ -114,6 +114,7 @@ typedef struct {
   // 0x04 - sneaking
   // 0x08 - sprinting
   // 0x10 - eating, makes extra8 act as eating timer
+  // 0x20 - client not fully loaded
   uint8_t flags;
 } PlayerData;
 

src/procedures.c

@@ -1019,6 +1019,7 @@ void handleServerTick (int64_t time_since_last_tick) {
   // Update player events
   for (int i = 0; i < MAX_PLAYERS; i ++) {
     if (player_data[i].client_fd == -1) continue;
+    if (player_data[i].flags & 0x20) continue;
     // Send Keep Alive and Update Time packets
     sc_keepAlive(player_data[i].client_fd);
     sc_updateTime(player_data[i].client_fd, world_time);